<?
//for xml parsing of itunes XML file

include "parseXML_functions.php";

$file="../library.xml";	//file containing xml iTunes library
$xml_parser=""; 
$songs=array(); 		//will hold each song in a 2-d array
$number_dicts=0;		//counter, number of 'dict' elements encountered
$current_key="";		//key for each element in second dimension of array
$current_element="";	//stores xml element name
$current_data="";		//value for second dimension array elements
$end_of_songs=FALSE;	//boolean used to help let us know if we're 
						//done with the song list

function start_element($parser, $name, $attribs) {
	global $current_element, $number_dicts;
	if($name=="DICT"){
		$number_dicts++;
	}
	if ($number_dicts>2){
		$current_element=$name;
	}
}

function end_element($parser, $name) {
	global $songs, $current_element, $current_data, $number_dicts, $array_key, $end_of_songs;
	if($end_of_songs){
		return;
	}
	if(!empty($current_element)) {
		if($current_element=="KEY"){
			$array_key=$current_data;
		}else{
			$songs[$number_dicts][$array_key]=$current_data;
		}
	}
}


function character_data($parser, $data) {
	global $number_dicts, $current_data, $end_of_songs;
	if($data=="Playlists") {
		$end_of_songs=TRUE;
	}
	$current_data=trim($data);
}

function refreshLibrary() {
	$file = "../library.xml";
	$xml_parser = xml_parser_create();
	xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, 1);
	xml_set_element_handler($xml_parser, "start_element", "end_element");
	xml_set_character_data_handler($xml_parser, "character_data");

	if (!($fp = @fopen($file, "r"))) {
		echo "could not open library: " . $file;
    	return false;
	}

	while ($data = fread($fp, 4096)) {
		if (!xml_parse($xml_parser, $data, feof($fp))) {
			die(sprintf("XML error: %s at line %d\n",
				xml_error_string(xml_get_error_code($xml_parser)),
				xml_get_current_line_number($xml_parser)));
	    }
	}

	xml_parser_free($xml_parser);
}

?>